# opentk/opentk

The Open Toolkit library is a fast, low-level C# wrapper for OpenGL, OpenAL & OpenCL. It also includes windowing, mouse, keyboard and joystick input and a robust and fast math library, giving you everything you need to write your own renderer or game engine. OpenTK can be used standalone or inside a GUI on Windows, Linux, Mac.

Repository: https://github.com/opentk/opentk
Canonical: https://ross.abutalabs.com/products/opentk
Homepage: https://opentk.net
Language: C#
License: NOASSERTION
License Family: other
Topics: c-sharp, opengl, opengl-es, graphics-library, game-development, math-library, scientific-visualization, openal, opencl, graphics, game-engine
Last push: 2026-08-05T12:29:20+00:00

## Health v2 (maintenance only)
Score: 77/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 96, release rhythm 40, longevity 100
- inputs: {"age_days": 4678, "days_push": 28, "days_rel": 534, "gap_med": 7, "n_releases_24m": 4}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3535, forks 643 (observed 2026-08-28T04:08:09.047174+00:00)

## What it is
OpenTK is a fast, low-level C# binding for OpenGL, OpenGL ES, OpenAL, and OpenCL, with windowing, input handling, and a linear algebra math library. It is a foundation for building renderers, games, and scientific applications rather than a game engine itself.

## Use cases
- render 3d graphics in c#
- write a game engine from scratch in .net
- add opengl to a winforms or wpf app
- play 3d audio in a c# application
- gpu compute with opencl in .net
- learn modern opengl with c#
- scientific visualization in .net

## When to choose
- you want low-level control over OpenGL/OpenAL/OpenCL from C#
- you need cross-platform graphics without external dependencies
- you want to build your own renderer or engine rather than use one

## When to avoid
- you want a full-featured game engine or high-level framework
- you need mobile (Android/iOS) support, which is not currently available
- you need Vulkan bindings in a stable release (only in OpenTK 5 preview)

## Facets
- artifact type: library
- maturity: active
- function: graphics, game-engine, audio-processing, math
- domain: graphics, cross-platform
- platform: windows, dotnet, cross-platform
- tags: opengl, openal, opencl, c-sharp, bindings, linear-algebra, scientific-visualization, game-development, linux, macos

## Member repositories
- opentk/opentk (main) score 77

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:09.047174+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:35:03.434931+00:00, confidence not recorded.
  - readme: https://github.com/opentk/opentk (fetched 2026-08-28T04:08:09.047174+00:00, sha c6d8212307af)
  - homepage: https://opentk.net (fetched 2026-08-29T09:28:51.527521+00:00, sha ea26065a6676)
  - site_page: https://opentk.net/faq.html (fetched 2026-08-29T09:28:51.530140+00:00, sha 3e6ef660133d)
- Data as of 2026-08-30T08:39:29.467469+00:00.